Lath-sawing machine



{No Mo del.)

J. T. HALL.

-LATH- SAWING MACHINE. No. 321,?16. Patented July 7, 1885.

Unirea %reres Parent rrrong JAMES T. HALL, ST. LOUIS, MICHIGAN.

LATH-SAWING MACHINE.

:BPCEJCATIOW forming part of Letters Patent No. 321,?16, dated July 7, 1885.

(No model.)

To all whom z' may concern:

Be it known that l, J AMES T. HALL, of St. Louis, in the eounty of Gratiot and State of Michigan, have invented new and useful lmprovernents in Lath-Machines; and I do hereby deelare that the following is a full,-clear, and exact description thereof, reference being had to the aceompanying drawings,which form a part of this speeifieation.

This invention relates to certain new and useful improvements in the eonstruction of machines which are designed to be enployed in connection with planing-machines for the purpose of dressing lumber upon one surface and grooving the same 'upon the opposite surface, such lumber being designed to be used for sheathing the interier walls of a building, and providing the necessary elings by means of which the nortar is secured in place. As lumber comes from the saws of the saw-mills it Varies slightly in thickness, and hence the importance in its use for building purposes of reducing it to a uniform thickness. This is done by passing it through a planer, and this planer delivers the lumber after it has been so reduced to the device herein described, wherein dovetailed-shaped grooves are forned in that face which is designed to be inwardly presented when the lnmber is used as sheathing, such device being driven froni the planer proper.

. The invention consists in the peeuliar construction of the parts and their combinations, as more fully hereinafter described and claimed.

Figure l is a perspeetive View of my improved device, showing a section of the adjacent bed of a planing-machine. Fig. 2 is a vertical central longitudinal section of the same. Fig. 3 is a cross-section on the line xx in Fig. 2. Fig. 4 is a diagram showing the relative inelinations of the saw-arbors.

In the drawings, A represents the bed of my improved machine, supported at one end upon the legs B, which at or near their lower ends are pivotally secured to the inelined tim bers or plates C, which are secured to the floor D of the mill by means of hinges a or any other equivalent devices. The opposite end of the table is supported upon or by the metallic frame E, which in turn is supported upon the upper ends of the inclined plates G,

which are held in this inelicd position by means of suitable bolts, d, which pass through the standards F, the lower ends of which also rest upon the floor of the mill. Slots e are forned in each of these standards, through which the bolts (7 pass to allow this end of the plates G to be elevated or depressed, as may be necessary in setting up the machine to bring the bed thereof upon a line and level with the bed G of the adjacent planer, which planer may be of any of the known and suit able constructions.

The standards F are connect-ed together by a eross-girth, H, and immediately below this cross-girth the plates O are connected together by a tie-bar, I, and a sctscrew, J, passing through the girth H into the tie-bar I, where a suitable swivel allows the operator, by means of the set-screw J, to lower this end of the bed A and its connections sufficient below the bed of the adjoining planer to allow the latter to be used independently of this device, in which ease the other end of the bed A would act as a carrying-off table to the lumber pass ing through the planer, the working parts of this device having by the means described been dropped sufficiently below the body of such planer to allow the lumber sent through it to pass over it onto the bed A beyond.

K is the main driving-shaft of this devicc, having thercon three pulleys, L, M, and O, the pulley M receiving its motion by means of a belt, P, from a suitable connection with the planing-machine, and the pulleys L and O, by means of belt-connections R and S, give motion to the saws by means of which the dovetailed grooves are cut upon the lower face of the lumber as it passcs over the planer.

T is an arbor driven by the belt R, and journaled in suitable boxes U in the iron frame E, which boxes are adapted to be adjustcd vertically by means of set-screws b. V is another arbor, also carrying a pulley, and is driven by means of the belt S; and this arber is supported in boxes provided with similar means of adjustment to those already deseribed. It will be noticed that these arbors are supported upon diagonal lines-that is to say, the end of the arber T, which earries the pulley, is .lower than its opposite end, while one end of the arbor V is lower than its opposite end, as is clearly shown in Figs. 1

ICO

and 4, the lower ends of such arbors being upon the same plane, and their opposite cnds being upon the same but a little higher plane, and each of these a'bors is provided with a series of saws, XV. These saws upon each arbor are largest upon that portion of the arber which is upon the lower plane, and they gradually dininish in size toward the opposite ends of the arbors, so that in their revolutions each saw cuts under the surface, tlereby forning a dovetailed groove.

At each corner of the iron frame E there are holes, through which pass the stens c, the lower projeeting ends whereof are surrounded by coiled springs (l These stens terninate in heads e', and in each pair of these heads are journaled the pressure-rolls h, these parts being so eonstructed that the springs d' will linit and control the Vertical niotion of such pressure-rolls.

That portion X of the bed A which extends across the Operating parts of this device to form a level connection between the beds G and A is provided with slots of proper size and properly located to allow the saws W to project through, and in their revolutions to operate upon the lower face of the lunber as it passes over the planer, which has reduced the boards to a uniforn thiekness.

In setting up this device it should be so set that the body G of the planer and the bed A of this device should be upon the same plane, when, the belt-connection being nade as described, the lunber, as it passes through the planer and is reduced to a connnon thickncss, passes under the first pressure-roll onto the portion X of the table, where it is subjccted to the operation of the saws and thence passes under the outer pressure-roll along the delivery or carrying bed A.

Should it be necessary to use the planer without this device, the screws d are slack` ened, when, by means of the set-screw J, this end of the device may be dropped until the pressure-rolls are below the body of the planer.

XVhat I claim as my invention isl. In conbination with adjustable saw-arbors carrying gradnated saws, and inclincd in opposite directions, journals for said arbors formed in an adjustable fra-nie pivoted to the floor and adjustable in standards arising therefron, and the table A, supported upon the pivoted frame, and providing recesses through which the saws operate, as set fort-h.

2. In a machine for the purposes described, the combination, with the standards F, rigid with the floor, and the frame C, pivoted to said floor and carrying the table A and sawframe E, of the cross-girth H, connecting said standards, and set-screw J, Operating through said girth and in the fraine to adjust the table relativcly to the planer-bed G, as set forth.

3. The pivoted frane C A E, substantially as described, in combination with the standards F, rigid with the floor, and provisionsas the girth H, connecting said standards, and the set-screw J, passing through said girth into the cross-bar L-for adjusting the height of the bed relatively to the planer-bed G, the saw-arbors T V, journaled in the frane E, and connected by belts with a power-shaft, also journaled in the pivoted frame, the whole arranged and serving as and for the purposes specified.

4. In a machine substantially as described, the combination, with the bed A, planer-bed G, and the saws, of a frane located between said beds A G and noving with the bed A, and the rollers 71, carried by said frane and serving the double function of holding the work to the saws when the saws are in position, and as friction-rollers for work from the planer when the movable franie is lowercd, as set fortl.

JAMES T. IIALL.

XVitnesses:

H. S. SPRAGUE, E. J. SCULLY. 

